Investigation of the process of fluoride ions adsorption by natural sorbents
Date
2021-03-01
Journal Title
Journal ISSN
Volume Title
Publisher
Видавництво Львівської політехніки
Lviv Politechnic Publishing House
Lviv Politechnic Publishing House
Abstract
A detailed analysis of literature sources on the content
of fluorides in the environment, methods of conditioning
and defluoridation of water was held. The mechanism of
interaction of fluorides with zeolite in the process of
adsorption treatment of wastewaters and domestic waters was
clarified. It was first established that in the process of
adsorption there is the formation of magnesium fluoride
compounds due to the binding of cations extracted from the
zeolite by the mechanism of ion exchange. The mechanism of
chemisorption of fluoride ions by the formation of insoluble
CaF2 was also proved. According to the results of experimental
research, a technological scheme has been developed, which
provides the preliminary treatment of fluoride ions in the form
of complexes with aluminium. In order to prevent the
permeation of aluminium fluoride into the treated water, a
stage of adsorption water purification was proposed. Calculations
of the amount of reagent necessary to ensure the required
degree of purification of water from fluoride ions were done.
The statistical parameters of the process and the significance
of the obtained results were calculated. The coefficient of
determination of experimental data was 0.87…0.99, the standard
deviation was 0.017…0.026.
Description
Keywords
adsorption, fluorides, sorbents, wastewaters, reagent treatment
Citation
Sabadash V. Investigation of the process of fluoride ions adsorption by natural sorbents / Vira Sabadash, Oksana Liuta, Jaroslaw Gumnitsky // Environmental Problems. — Lviv : Lviv Politechnic Publishing House, 2021. — Vol 6. — No 3. — P. 181–187.